Electron Transport of Photoconductive n‐Type Liquid Crystals Based on a Redox‐Active Tetraazanaphthacene Framework |
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| Authors: | Dr Kyosuke Isoda Tomonori Abe Prof Masahiro Funahashi Prof Makoto Tadokoro |
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| Institution: | 1. Department of Chemistry, Faculty of Science, Tokyo University of Science, 1‐3 Kagurazaka, Shinjuku‐ku, Tokyo 162‐8601 (Japan), Fax: (+81)?3‐3260‐4271;2. Department of Advanced Materials Science, Faculty of Engineering, Kagawa University, 2217‐20 Hayashi‐cho, Takamatsu, Kagawa 761‐0396 (Japan) |
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| Abstract: | The preparation of two liquid crystals composed of a redox‐active tetraazanaphthacene (TANC) framework is reported. The materials form smectic A (SmA) thin‐film liquid‐crystalline (LC) phases over a wide temperature range. Cyclic voltammetry analysis revealed that LC TANCs behave as organic electron acceptors. The electron mobilities of the thin films were determined by time‐ of‐flight (TOF) measurements, which are the order of 10?4 cm2 V?1 s?1 in the SmA LC phase. This value is two orders of magnitude larger than those of amorphous organic semiconductors. To the best of our knowledge, very few reports exist on the electron‐transporting behaviors of LC N‐heteroacene semiconductors. |
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| Keywords: | liquid crystals N‐heteroacenes n‐type self‐assembly semiconductor |
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